Dust-cap.



L. COBB & F. PlTMANf DUST CAP."

APPLICATION FILED FEB. 18, 1915.

1 9 l Patented Aug. 24, 1915.

fizz

Attorneys r 1? e ei 51 .2%

LU 0GB AND HARRIS PI'IMAN, 0F :BEIDFOED, INDIANA.

Application filed February 18, 1915. eeriel 1%. 133%,

T 0 oil whom it may concern,

Be it known that we, LUTHER Conn and.

Exams PITMAN, citizens of the United States, residing et'Bedforci, in the county of Lawrence, State of Indiana, have invented a new and useful Dust-Cap, of which the following is a specification.

The present invention apperteins to a, dust cap for tire valve stems, and aims $013160- vide a novel and. improved dust cap which may be quickly applied to and. detached from the velvestem, and which Wile: an piieci thereto will bind or look itseif in position thereon, so that the cap cannot become accicienteiiy loosened or detached due to the vibration of the Wheel.

13 is also within the scope of the invention to provide a dust cap having the features above noted, and which is of comparetiveiy simple, compact, non-encumbering and inexpensive construction, as Weil as being convenient, efiicient and thoronghi practicei in With the foregoing and other objects in View which Wiii appear as the description proceeds, the invention resides in the coinbination and arrangement of parts and in the cieteiis of construction hereinafter described and chimed. it being unfierstooci that changes in the precise embodiment of the invention herein disclosed can be made Within the scope of What is claimed Without departing from the spirit of the invention. The invention is iiiustrateoi in the eceoinpenying drawing, Wherein- Figure 1 is a, side elevation of the improved dust cap. Fig. '2 is a central iongitudinei section thereof. Fig. 3 is e cross sectional ViW taken on the line 3-3 of Fig. 1. Fig. i is a. bottom View of the cap. 5 is a fi'agmentei elevation of a portion of the eep.

- carrying out the invention, tn-

terioi? of the cap is ctheiwise smooth. ihe mutilated screw (:11 olicis embody r e metriceiiy opposite'tnreeeii portions 2 jacent the lower end or mouth of the cap. The three/Lied .0 are "esigneii to slide along the sides the tiife vii the can i may he off of. the veive eii so tnet the e when. i s

ed portions lie valv stem.

A cone? 3 three adjacent its lower en. secured in piece in securing eiement at, prevent ioosening or of tee L A The col 3 is pi'fiiiitld. with an alienate recess 5 pi-ovifiing stop 3 at one enci there of. The cap 1 is provided with an exterior screw thread '7 beiow the ceiiar 3 b the seici c liar and the eno. of cap, and tile three is of large pitch or is ognicir 1 adjacent .ni'eeci.

A ring or circular not 8 0- iower end of the cap 1, the being engaged to the quie the cap, so as tote roteteiaie upon of the cap, and to move en collar 3 es the ring" or not 8 is ring or: not isqnroviz d inweriy, proje H jeeent the iewer face of in; 3 and. which is edepteii or the lower enfi of the e It in not 8 is screwed up y neon the limit. The 9 e opening 10, enoi the ring to not with e riepenciing c3." annular ii 11 depending beiow nenge 9, enci adopted to sew which is tin'eacied upon the thereeof.

A pin 12 is the ring; or not me. within the recess e the eeiier Ti. yes

I? or not iiient one L '1 2 Kilt o em 01% the o mcnt wi 4 can 1., be

onto em fer-enee.

in nee, 7 time one 3 1e 1 ct against will lock or bind the cap upon the valve may be readily slid over the valve stem to bring the nut 8 against the washer upon thestem, which will limit the downward movement' of the cap upon the valve stem. Then,

.by giving the cap 1 a right hand turn, the

threaded portions 2 being right handed, as Well as the inter-engaging screw threads of the cap and nut 8, the threaded portions 2 of the cap will be swung into engagement with the threads ofthe valve stem, but the nut-8 will be restrained in a non-rotatable position, and as aresnlt, the stop 6 of the collar 3 will be moved away from the pin 12 of the nut, and the cap 1 will screw downwardly'into the nut 8, which Will cause the nut and cap to bind tightly together. This stem, and whereby the cap cannotbecome accidentally loosened or detached notwithstanding the severe vibrations to which the wheel is subjected. This binding action may be accomplished either by the contact of the nut 8 and collar 3, or the contact of the lower end of the cap 1 and flange 9 of the nut. To remove the cap, it is only necessary to give the cap 1 a partial turn so as to bring the stop 6 of the collar 3 against the pin 12, in which event the cap and nut maybe readily slid off of the valve stem.

The advantages and attributes of the present dust cap will no doubt be obvious from the foregoing taken in connection with the drawing without further comment being necessary.

' Having thus described the, invention, what is claimed as newis:

In a device of the character described, a cap having inner mutilated screw threads, a collar thereon adjacent its lower end, and external screw threads between the said collar and lower end ot the cap, the collar having an arcuate recess providing a stop at one end thereof, and a nut engaging the screw threads of the cap and having an in- 'wardly projecting annular flange below the lower end of the cap and providing a restricted non-circular opening, whereby the nut is slidable and non-rotatable upon a valve stem, the nut having a pin working within the said recess of the collar and ad pted to contact with the said step, and the mutilated screw threads of the cap being such that when the pin and stop are in contact, .the cap is slidable upon the valve stem with the nut.

In testimony that we claim the foregoing as our own, we have hereto affixed our signatures in the presence of two witnesses.

LUTHER COBB. FARBTS PITMAN.

Witnesses:

JOHN H. UNDERWOOD, THos. C. UNDERWOOD. 

